Science and Technology Field This project belongs to a highly reliable embedded computer system that is used in launch vehicle control systems. Main scientific and technological innovations (1) For the first time in domestic launch vehicles, a hierarchical distributed vehicle-borne control computing system based on a digital time-division command response type multiplexed data bus has been proposed, breaking through the launch vehicle's distributed information collection and processing and hierarchical segmentation Bus communication control technology solves the problem of real-time system control under distributed conditions. It not only achieves strong real-time attitude control of the launch vehicle in a 4ms cycle, but also has the high flexibility of a distributed bus system. Strong scalability. (2) For the first time, the hierarchical collaborative processing architecture of ldquo; communication + computingrdquo; was adopted on domestic launch vehicles, which broke through the key technology of two-level control of launch vehicle information flow and solved the problem of multi-task processing under the coexistence of periodic and sudden tasks., realizing the unification of the communication control center and the flight control center. (3) For the first time, a multi-machine software and hardware collaborative information synchronization scheme based on shared storage was adopted on the launch vehicle, which broke through the multi-machine information synchronization technology under strong real-time conditions, effectively solved the conflict problem of multi-machine access, and achieved 1. Highly reliable transmission of attitude control information, guidance control information, timing control information, and operating state detection information within 1ms. (4) For the first time, a highly reliable clock tight synchronization scheme has been adopted on the launch vehicle, which breaks through the reliable switching control technology of redundant clocks, solves the problem that synchronous clock switching hinders the continuity of the mission, and realizes a flight control period (20ms) Complete synchronous clock switching within the launch vehicle mission to ensure seamless and continuous execution. (5) For the first time, a highly reliable computing and processing architecture adapted to ldquo; position loop + current loop; electric servo system has been adopted in the launch vehicle, breaking through the real-time acquisition and processing technology of small signals under high-power and strong interference conditions, and improving The dynamic following performance of the electric servo system has current loop control with 0.2ms cycle and position loop control with 1ms cycle, achieving high-precision control of the electric servo system. 3. Role and significance in promoting scientific and technological progress The project is technically complex and difficult to develop, and has obtained a number of independent intellectual property rights. The project published 17 papers, formed 8 software copyrights, and 2 patent applications are under acceptance. Among them, hierarchical distributed control computing systems, unified architecture, multi-machine coordination, high-precision clock synchronization technology, and high-reliability electric servo control technology have reached the domestic leading level, with significant military benefits and social and economic benefits. 4. Application and promotion The actual use of users shows that the distributed vehicle-borne control computing system operates stably and reliably in the real-installation operation environment, meeting the needs of the Long March 6 launch vehicle. At the same time, it has good versatility and can meet the application needs of other launch vehicles. It has been selected by the Long March 6A launch vehicle and is planned to be selected by the Long March 4B/C and the Long March 2D launch vehicle. With the popularization and application of the system in other models, it is conservatively estimated that it can generate economic benefits of at least hundreds of millions of yuan.